JP6077775B2 - Wire and terminal connection structure - Google Patents

Description

  The present invention relates to a connection structure between an electric wire and a terminal.

14 and 15 show a connection structure between an electric wire and a terminal disclosed in Patent Document 1 below.
The connection structure between the electric wire and the terminal is a structure in which a plurality of core wires 2 included in the multicore electric wire 1 are conductively connected to a plurality of terminal fittings 5.

  Each core wire 2 of the multi-core electric wire 1 has a structure in which an insulation coating is applied to the outer periphery of a wire bundle in which a plurality of strands are twisted and bundled.

  As shown in FIG. 15, one end of the terminal fitting 5 is formed on the pin terminal 5 </ b> A, and the other end is formed on the needle 5 </ b> D that pierces the core wire 2. The terminal fitting 5 obtains a conductive connection by contact between the terminal wire 5 and the core wire 2 when the needle 5D is pierced from the axial direction thereof.

  In the connection structure of Patent Document 1, the core wire holder 3, the wire cap 6, the insert 4, and the connector housing 7 are used for connecting the core wire 2 and the terminal fitting 5.

  The core wire holder 3 is a member that positions the plurality of core wires 2 in an aligned state at a predetermined arrangement pitch on the circumference. On the outer peripheral surface of the core wire holder 3, a male screw 3A for connection with the wire cap 6 and the connector housing 7 is engraved.

  The electric wire cap 6 is a member that fixes the core wire holder 3 in which the core wire 2 is positioned to the multi-core electric wire 1. The electric wire cap 6 is formed with a female screw 6 </ b> A that is screwed into the male screw 3 </ b> A of the core wire holder 3 on the inner peripheral surface on the distal end side that is externally fitted to the core wire holder 3. Further, the inner peripheral surface on the base end side of the wire cap 6 is a tapered surface 6B that gradually decreases in diameter toward the base end.

  The electric wire cap 6 fixes the core wire holder 3 to the multi-core electric wire 1 by tightening the core wire holder 3 with the tapered surface 6B when the female screw 6A is screwed into the male screw 3A of the core wire holder 3.

  The insert 4 is a member that aligns and fixes the plurality of terminal fittings 5 in an arrangement corresponding to the arrangement pitch of the plurality of core wires 2.

  The connector housing 7 has a housing portion 7 </ b> C for housing the insert 4, and a female screw 7 </ b> A that engages with the male screw 3 </ b> A of the core wire holder 3 is formed on the inner peripheral surface on the base end side. Further, a flange portion 7B for positioning the accommodated insert 4 is provided at the tip of the accommodating portion 7C.

  In the connector housing 7, when the female screw 7A on the base end side is screwed into the male screw 3A, the flange portion 7B presses the insert 4 toward the core wire 2 toward the core wire holder 3, and the needle 5D is pierced into the core wire 2. To.

  In the case of the connection structure between the electric wire and the terminal in Patent Document 1, the covered electric wire connecting the terminal fitting can be connected to the terminal fitting without removing the coating. Therefore, compared to the case of using a conventional crimp-type terminal fitting, in which the sheath of the covered wire is stripped over a predetermined length and then the crimped piece of the terminal fitting is crimped on the exposed wire conductor, the wire connection Work can be facilitated.

JP 11-67291 A

  However, in the case of the electric wire and terminal connection structure of Patent Document 1 described above, a round multi-core electric wire 1 is assumed as an electric wire to be conductively connected, and when a plurality of single-core electric wires are conductively connected, Not suitable.

  Furthermore, in the case of the connection structure between the electric wire and the terminal of Patent Document 1, there are many parts to be assembled, and there is a problem that the assembly work takes time because there are screw parts in the assembly parts.

  Accordingly, an object of the present invention is to solve the above-mentioned problems, and can electrically connect a plurality of terminal fittings and a plurality of single-core electric wires at a time, and has a small number of components and a plurality of single-cores. An object of the present invention is to provide a connection structure between an electric wire and a terminal capable of greatly improving the connection workability between the electric wire and a plurality of terminal fittings.

The above-described object of the present invention is achieved by the following configuration.
(1) A plurality of single-core electric wires having a single core wire in which a plurality of strands are twisted and bundled, and an insulating coating covering the periphery of the core wire,
A plurality of terminal fittings comprising: a terminal fitting portion that is fitted and connected to a mating connection terminal; and a piercing needle portion that is provided behind the terminal fitting portion and can pierce the core wire;
A plurality of terminal accommodating portion and the puncture needle portion of the plurality of the terminal fitting is a plurality of receiving spaces which are individually compartment containing the entire each of the terminal fitting so as to be arranged in a planar shape in a predetermined arrangement pitch, A plurality of electric wires that are located at the rear ends of the plurality of terminal accommodating portions and that are a plurality of individually partitioned openings that are located behind the tip of the piercing needle portion of the terminal fitting accommodated in the terminal accommodating portion. A state in which a plurality of single-core electric wires are provided with the insulating coating so that the center axes of the piercing needle portion and the core wire of the terminal fitting accommodated in the terminal accommodating portion are substantially the same as the insertion port. while a plurality of wire insertion port for respectively guiding the respective said piercing needle portion, the insulating resin-made connector housing with a,
With
The terminal fitting is integrally formed with an electric wire guide plate for guiding the single core electric wire on the central axis of the piercing needle portion,
The wire guide plate is a plate-like portion that extends in a tongue-like shape from the bottom wall of the terminal fitting portion of the tubular structure to the rear end side,
A needle support portion extending from the side portion is integrally formed on the side portion of the wire guide plate,
The piercing needle portion is integrally formed at the distal end portion in the extending direction of the needle support portion,
By inserting the plurality of single core wires into the plurality of wire insertion ports of the connector housing containing the plurality of terminal fittings, respectively, and piercing the piercing needle portion into the core wire of each single core wire A connection structure between an electric wire and a terminal, wherein conductive connection between the plurality of single-core electric wires and the plurality of terminal fittings is completed.

(2) The wire and the terminal according to (1), wherein the strand of the pierced core wire is fitted on an outer periphery of the piercing needle portion and an annular groove having a V-shaped cross section is provided. Connection structure.

  According to the configuration of (1) above, a plurality of single-core electric wires are inserted into the electric wire insertion openings of the connector housing to which a plurality of terminal fittings are already attached, and the core wires of the single-core electric wires are connected to the piercing needles in the connector housing. When it hits against the part, each piercing needle part is stuck into each core wire, and a plurality of terminal fittings and a plurality of single core electric wires can be collectively connected.

  Moreover, the component parts need only be a connector housing, a terminal fitting, and a single core electric wire, and there are few component parts. Furthermore, the component parts do not require screw parts that are troublesome in assembly work.

Therefore, the connection workability between the plurality of single-core electric wires and the plurality of terminal fittings can be greatly improved. In addition, insert a single core wire into the wire insertion port of the connector housing,
When piercing the piercing needle part into the core wire, since the single core electric wire is guided to the piercing needle part by the wire guide plate integrally formed with the terminal fitting, it is possible to improve the accuracy of the work of piercing the piercing needle part into the core wire. it can.

  According to the configuration of (2) above, the groove for fitting the core wire is provided in the puncture needle portion, thereby increasing the contact length and the contact area between the puncture needle portion and the core wire. Connection performance can be improved.

  According to the connection structure of the electric wire and the terminal according to the present invention, a plurality of single core electric wires are inserted into the electric wire insertion port of the connector housing to which a plurality of terminal fittings are already attached, When each piercing needle part is abutted, each piercing needle part is pierced into each core wire, and a plurality of terminal fittings and a plurality of single-core electric wires can be conductively connected together. Moreover, the component parts need only be a connector housing, a terminal fitting, and a single core electric wire, and there are few component parts. Furthermore, the component parts do not require screw parts that are troublesome in assembly work.

  Therefore, the connection workability between the plurality of single-core electric wires and the plurality of terminal fittings can be greatly improved.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

FIG. 1 is a side view of a connector housing that houses terminal fittings used in the first embodiment of the connection structure of electric wires and terminals according to the present invention. FIG. 2 is an enlarged view of the piercing needle portion provided in the terminal fitting of FIG. FIG. 3 is a side view of a state before a single core electric wire is inserted into the electric wire insertion port of the connector housing of FIG. FIG. 4 is a cross-sectional view showing a state in which the piercing needle portion pierces the core wire of the single-core electric wire and the piercing needle portion and the core wire are conductively connected in the first embodiment. FIG. 5 is a plan view of the connector housing in a state where the conductive connection of the single-core electric wire to the terminal fitting is completed. FIG. 6 is a side view of the connector housing in a state where the conductive connection of the single-core electric wire to the terminal fitting is completed. FIG. 7 is a side view of a connector housing containing a terminal fitting used in the second embodiment of the electric wire and terminal connection structure according to the present invention. FIG. 8 is a perspective view of a metal plate terminal fitting housed in the connector housing shown in FIG. FIG. 9 is a development view of the terminal fitting shown in FIG. FIG. 10 is a side view of a state before a single core wire is inserted into the wire insertion port of the connector housing of FIG. FIG. 11 is a plan view showing a state in which the piercing needle portion pierces the core wires of two single-core electric wires and the two piercing needle portions and the two core wires are conductively connected in the second embodiment. FIG. 12 is an external view of another embodiment of the puncture needle portion according to the present invention. FIG. 13A is a side view of the connector housing in a state where the conductive connection of the single-core electric wire is completed to the terminal fitting, and FIG. 13B is a side view of the connector housing after the cover is attached. FIG. FIG. 13B is a cross-sectional view taken along the line AA in FIG. 13B, and FIG. 13D is a cross-sectional view taken along the line BB in FIG. FIG. 14 is a longitudinal sectional view of a conventional connecting structure of electric wires and terminals. FIG. 15 is an exploded view of the components used in the connection structure of FIG.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of an electric wire and terminal connection structure according to the invention will be described in detail with reference to the drawings.

  1 to 6 show a first embodiment of a connection structure between an electric wire and a terminal according to the present invention. FIG. 1 is a side view of a connector housing containing a terminal fitting used in the first embodiment of the present invention. FIG. 2, FIG. 2 is an enlarged view of a puncture needle portion mounted on the terminal fitting of FIG. 1, FIG. 3 is a side view of a state before a single core wire is inserted into the wire insertion port of the connector housing of FIG. In 1st Embodiment, sectional drawing of the state in which the piercing needle part stabbed into the core wire of the single core electric wire, and the piercing needle part and the core wire were conductively connected, FIG. 5 completed the conductive connection of the single core electric wire to the terminal fitting FIG. 6 is a plan view of the connector housing in a state, and FIG. 6 is a side view of the connector housing in a state in which the conductive connection of the single-core wire is completed with the terminal fitting.

  The electric wire and terminal connection structure of the first embodiment uses a plurality of single-core electric wires 10, a plurality of terminal fittings 20, and a single connector housing 30.

  As shown in FIG. 3, the single-core electric wire 10 has a single core wire 11 in which a plurality of strands 11 a are twisted and bundled, and an insulating coating 12 that covers the periphery of the core wire 11.

  As shown in FIG. 1, the terminal fitting 20 includes a cylindrical terminal fitting portion 21 that is fitted and connected to a mating connection terminal (not shown), a piercing needle portion 22, and an electric wire guide plate 23.

  The piercing needle part 22 is projected from the rear end part of the terminal fitting part 21 toward the rear. The piercing needle portion 22 is a sharp needle that can be pierced into the core wire 11.

  The wire guide plate 23 has a structure in which the bottom wall of the terminal fitting portion 21 is extended in the form of a tongue piece on the rear end side. The electric wire guide plate 23 is integrally formed with the terminal fitting portion 21 and guides the single core electric wire 10 with the insulating coating 12 on the central axis of the piercing needle portion 22. Although not shown, the electric wire guide plate 23 is provided with a groove having a semicircular arc shape or a V-shaped cross section for guiding the single core electric wire 10.

  In the case of the terminal fitting 20 of the present embodiment, the terminal fitting portion 21 and the wire guide plate 23 are integrally formed by press molding of a metal plate, and the piercing needle portion 22 fixes another component to the rear end of the terminal fitting portion 21. I am letting.

  The connector housing 30 is made of an insulating resin and includes a terminal accommodating portion 31 and a wire insertion port 32. A partition wall 33 is provided in the connector housing 30 so that the terminal fitting 20 is not short-circuited.

  The terminal accommodating portion 31 is an accommodating space in which the terminal fitting 20 can be inserted from the rear of the housing. The terminal accommodating portion 31 accommodates the plurality of terminal fittings 20 so that the piercing needle portions 22 of the plurality of terminal fittings 20 are arranged in a plane at a predetermined arrangement pitch.

  The electric wire insertion opening 32 opens at the rear end of the connector housing 30. The electric wire insertion port 32 guides the single core electric wire 10 inserted from the opening to the piercing needle portion 22 in cooperation with the electric wire guide plate 23 described above. More specifically, the wire insertion port 32 insulates the plurality of single-core electric wires 10 so that the central axes of the piercing needle portion 22 of the terminal fitting 20 and the core wire 11 that are accommodated in the terminal accommodating portion 31 substantially coincide with each other. The puncture needle portion 22 is guided while the coating 12 is provided.

  In the connection structure between the electric wire and the terminal of this embodiment, as shown in FIG. 3, a plurality of single-core electric wires 10 are covered with an insulating coating 12 in an electric wire insertion port 32 of a connector housing 30 in which a plurality of terminal fittings 20 are accommodated. 4, the plurality of single-core electric wires 10 and the plurality of terminal fittings 20 are electrically connected to each other by inserting the piercing needle portion 22 into the core wire 11 of each single-core electric wire 10 as shown in FIG. To.

  When the piercing needle portion 22 is pierced into the core wire 11 of the single-core electric wire 10, the insulation coating 12 of the single-core electric wire 10 tightens each element wire 11 a of the core wire 11 to the outer periphery of the piercing needle portion 22, and the piercing needle portion 22 and the core wire. 11, a stable conductive connection state can be obtained.

  As shown in FIG. 5 and FIG. 6, when two single core electric wires 10 are conductively connected, two single core electric wires 10 are inserted into the electric wire insertion port 32 at the same time, thereby providing two single core electric wires. 10 can be collectively connected to the two terminal fittings 20.

  According to the wire and terminal connection structure of the first embodiment described above, a plurality of single-core wires 10 are inserted into the wire insertion port 32 of the connector housing 30 to which a plurality of terminal fittings 20 have been attached as shown in FIG. When the core wire 11 of each single-core electric wire 10 is abutted against each piercing needle portion 22 in the connector housing 30, each piercing needle portion 22 is attached to each core wire 11, as shown in FIGS. The pierced state is established, and the plurality of terminal fittings 20 and the plurality of single-core electric wires 10 can be collectively connected.

  In addition, the component parts need only be the connector housing 30, the terminal fitting 20, and the single core electric wire 10, and the number of component parts is small. Furthermore, the component parts do not require screw parts that are troublesome in assembly work.

  Therefore, the connection workability between the plurality of single core electric wires 10 and the plurality of terminal fittings 20 can be greatly improved.

  Moreover, according to the connection structure of the electric wire and the terminal of the first embodiment, when the single core electric wire 10 is inserted into the electric wire insertion port 32 of the connector housing 30 and the piercing needle portion 22 is inserted into the core wire 11, the single core electric wire is used. Since 10 is guided to the piercing needle portion 22 by the electric wire guide plate 23 formed integrally with the terminal fitting 20, the accuracy of the operation of piercing the piercing needle portion 22 into the core wire 11 can be improved.

  FIGS. 7 to 11 show a second embodiment of the wire-terminal connection structure according to the present invention, and FIG. 7 is a side view of the connector housing containing the terminal fittings used in the second embodiment of the present invention. 8 is a perspective view of a sheet metal terminal fitting housed in the connector housing shown in FIG. 7, FIG. 9 is a development view of the terminal fitting shown in FIG. 8, and FIG. 10 is an electric wire of the connector housing shown in FIG. FIG. 11 is a side view of a state before a single core electric wire is inserted into the insertion port, and FIG. 11 shows two piercing needle portions and two piercing needle portions inserted into the core wires of two single core electric wires in the second embodiment. It is a top view of the state by which the core wire was conduct-connected.

  The electric wire and terminal connection structure of the second embodiment uses an improved terminal fitting 20A instead of the terminal fitting 20 shown in the first embodiment.

  Parts used other than the terminal fitting 20A are the same as those in the first embodiment, and common parts are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 8, the terminal fitting 20 </ b> A according to the second embodiment includes a cylindrical terminal fitting portion 21, a piercing needle portion 22 provided behind the terminal fitting portion 21, and a wire guide plate 23. And the needle support part 24 which supports the puncture needle part 22 is integrally formed by press molding from one metal plate. FIG. 9 is a development view of the terminal fitting 20.

  Also in the case of the electric wire and terminal connection structure of the second embodiment, the operation procedure when connecting the single-core electric wire 10 is the same as that of the first embodiment.

  That is, as shown in FIG. 10, a plurality of single-core electric wires 10 are inserted into the wire insertion openings 32 of the connector housing 30 in which the plurality of terminal fittings 20A are accommodated with the insulating coating 12 still attached. As shown, the plurality of single-core electric wires 10 and the plurality of terminal fittings 20 are brought into a conductive connection state by piercing the piercing needle portion 22 into the core wire 11 of each single-core electric wire 10.

  As in the second embodiment, when the piercing needle portion 22 is also integrally formed with the terminal fitting 20A by pressing a metal plate, the separate piercing needle portion 22 is welded afterwards to the terminal fitting portion 21. The manufacturing cost of the terminal fitting part 21 can be reduced compared with the case where it fixes to back.

  FIG. 12 shows another embodiment of the puncture needle portion equipped in the terminal fitting in the electric wire and terminal connection structure of the present invention.

  The piercing needle portion 22A shown in FIG. 12 is provided with a groove 22b on the outer periphery of the needle. The groove 22b is a groove into which the element wire 11a of the core wire 11 pierced by the piercing needle portion 22A is fitted.

  As shown in FIG. 12, the contact length and contact area between the piercing needle portion 22A and the core wire 11 are increased by providing the piercing needle portion 22A with the groove 22b into which the element wire 11a of the core wire 11 is fitted. Electrical connection performance can be improved.

  FIG. 13 shows a third embodiment of the connection structure between an electric wire and a terminal according to the present invention, in which a structure for preventing the removal of the single-core electric wire 10 is added to the configuration of the first embodiment. The connector housing 30 is configured to be fitted with a cover 34. FIG. 13A is a side view of the connector housing 30 in a state where the conductive connection of the single-core electric wire 10 to the terminal fitting 20 is completed, and FIG. 13B is a side view of the connector housing 30 after the cover is mounted. ) Is an AA sectional view of FIG. 13B, and FIG. 13D is a BB sectional view of FIG. 13B.

  By locking the locking protrusions 30a provided on the connector housing 30 in the locking holes 34a provided on the cover 34, the single-core electric wire 10 is pressed and bent down as shown in FIG. 13 (b). As described above, when the single-core electric wire 10 is bent and pressed by the cover 34, the strength in the pulling direction of the connection structure of the single-core electric wire 10 and the terminal fitting 20 is increased, and the single-core electric wire 10 is difficult to come off. In order to increase the strength in the pulling direction of the connection structure, it is preferable to fix the single-core electric wire 10 with the cover 34 as described above.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

  For example, the terminal fitting may have a structure in which the wire guide plate connected to the terminal fitting portion is omitted because the core wire is conductively connected to the terminal fitting portion via the wire connecting needle.

  Moreover, the quantity of the terminal metal fittings and single core electric wires which are connected to be collectively connected is not limited to the embodiment, and can be changed to an arbitrary quantity.

  In some cases, in the connector housing, the terminal accommodating portion and the wire insertion port may be respectively formed in two upper and lower stages of the housing.

  Here, the features of the embodiment of the electric wire and terminal connection structure according to the present invention described above are summarized and listed in the following [1] to [3], respectively.

[1] A plurality of single-core electric wires (10) having a single core wire (11) in which a plurality of strands (11a) are twisted and bundled, and an insulating coating (12) covering the periphery of the core wire (11) When,
A terminal fitting portion (21) that is fitted and connected to a mating connection terminal; and a piercing needle portion (22) that protrudes from the terminal fitting portion (21) and can pierce the core wire (11). A plurality of terminal fittings (20),
A terminal accommodating portion (31) for accommodating the plurality of terminal fittings (20) such that the piercing needle portions (22) of the plurality of terminal fittings (20) are arranged in a plane at a predetermined arrangement pitch; The plurality of single core electric wires (10) so that the central axes of the piercing needle portion (22) and the core wire (11) of the terminal fitting (20) accommodated in the accommodation portion (31) are substantially coincident with each other. A connector housing (30) made of an insulating resin, and an electric wire insertion port (32) for guiding the piercing needle portion (22) to the piercing needle portion (22) with the insulating coating (12) provided.
With
A plurality of the single core electric wires (10) are inserted into the electric wire insertion openings (32) of the connector housing (30) in which the plurality of terminal fittings (20) are accommodated, and the single core electric wires (10) are inserted. The continuity connection between the plurality of single-core wires (10) and the plurality of terminal fittings (20) is completed by piercing the piercing needle portion (22) into the core wire (11). And terminal connection structure.

  [2] In the above [1], the outer periphery of the piercing needle portion (22) is provided with a groove (22b) into which the element wire (11a) of the pierced core wire (11) is fitted. Connection structure of electric wire and terminal as described.

  [3] The terminal fitting (20) is integrally formed with an electric wire guide plate (23) for guiding the single core electric wire (10) onto the central axis of the piercing needle portion (22). The wire and terminal connection structure according to [1] or [2] above.

DESCRIPTION OF SYMBOLS 10 Single core electric wire 11 Core wire 11a Strand 20 Terminal metal fitting 21 Terminal fitting part 22,22A Puncture needle part 22b Groove 23 Electric wire guide plate 30 Connector housing 31 Terminal accommodating part 32 Electric wire insertion port 33 Bulkhead 34 Cover

Claims (2)

A plurality of single-core electric wires having a single core wire in which a plurality of strands are twisted and bundled, and an insulating coating covering the periphery of the core wire;
A plurality of terminal fittings comprising: a terminal fitting portion that is fitted and connected to a mating connection terminal; and a piercing needle portion that is provided behind the terminal fitting portion and can pierce the core wire;
A plurality of terminal accommodating portion and the puncture needle portion of the plurality of the terminal fitting is a plurality of receiving spaces which are individually compartment containing the entire each of the terminal fitting so as to be arranged in a planar shape in a predetermined arrangement pitch, A plurality of electric wires that are located at the rear ends of the plurality of terminal accommodating portions and that are a plurality of individually partitioned openings that are located behind the tip of the piercing needle portion of the terminal fitting accommodated in the terminal accommodating portion. A state in which a plurality of single-core electric wires are provided with the insulating coating so that the center axes of the piercing needle portion and the core wire of the terminal fitting accommodated in the terminal accommodating portion are substantially the same as the insertion port. while a plurality of wire insertion port for respectively guiding the respective said piercing needle portion, the insulating resin-made connector housing with a,
With
The terminal fitting is integrally formed with an electric wire guide plate for guiding the single core electric wire on the central axis of the piercing needle portion,
The wire guide plate is a plate-like portion that extends in a tongue-like shape from the bottom wall of the terminal fitting portion of the tubular structure to the rear end side,
A needle support portion extending from the side portion is integrally formed on the side portion of the wire guide plate,
The piercing needle portion is integrally formed at the distal end portion in the extending direction of the needle support portion,
By inserting the plurality of single core wires into the plurality of wire insertion ports of the connector housing containing the plurality of terminal fittings, respectively, and piercing the piercing needle portion into the core wire of each single core wire A connection structure between an electric wire and a terminal, wherein conductive connection between the plurality of single-core electric wires and the plurality of terminal fittings is completed. The wire / terminal connection structure according to claim 1, wherein the strand of the pierced core wire is fitted on an outer periphery of the piercing needle portion and an annular groove having a V-shaped cross section is provided.

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